From e4730191db7afd2b2e1589550a39a96b24639ee4 Mon Sep 17 00:00:00 2001
From: AbeniMatteo <634710+AbeniMatteo@users.noreply.github.com>
Date: Thu, 29 Jul 2021 06:20:03 +0200
Subject: [PATCH] Set default file priorities when not specified (#15190)

---
 src/base/bittorrent/session.cpp     | 18 ++++++++++++++----
 src/base/bittorrent/torrentimpl.cpp |  4 ++++
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/src/base/bittorrent/session.cpp b/src/base/bittorrent/session.cpp
index aebb53d54..46aa29235 100644
--- a/src/base/bittorrent/session.cpp
+++ b/src/base/bittorrent/session.cpp
@@ -89,6 +89,7 @@
 #include "common.h"
 #include "customstorage.h"
 #include "dbresumedatastorage.h"
+#include "downloadpriority.h"
 #include "filesearcher.h"
 #include "filterparserthread.h"
 #include "loadtorrentparams.h"
@@ -2146,12 +2147,21 @@ bool Session::addTorrent_impl(const std::variant<MagnetUri, TorrentInfo> &source
         }
 
         Q_ASSERT(p.file_priorities.empty());
-        std::transform(addTorrentParams.filePriorities.cbegin(), addTorrentParams.filePriorities.cend()
-                       , std::back_inserter(p.file_priorities), [](const DownloadPriority priority)
+        if (addTorrentParams.filePriorities.empty())
         {
-            return static_cast<lt::download_priority_t>(
+            // Use qBittorrent default priority rather than libtorrent's (4)
+            p.file_priorities = std::vector(metadata.filesCount(), static_cast<lt::download_priority_t>(
+                    static_cast<lt::download_priority_t::underlying_type>(DownloadPriority::Normal)));
+        }
+        else
+        {
+            std::transform(addTorrentParams.filePriorities.cbegin(), addTorrentParams.filePriorities.cend()
+                           , std::back_inserter(p.file_priorities), [](const DownloadPriority priority)
+            {
+                return static_cast<lt::download_priority_t>(
                         static_cast<lt::download_priority_t::underlying_type>(priority));
-        });
+            });
+        }
 
         p.ti = metadata.nativeInfo();
     }
diff --git a/src/base/bittorrent/torrentimpl.cpp b/src/base/bittorrent/torrentimpl.cpp
index 16670688b..d36fe9b3d 100644
--- a/src/base/bittorrent/torrentimpl.cpp
+++ b/src/base/bittorrent/torrentimpl.cpp
@@ -1512,6 +1512,10 @@ void TorrentImpl::endReceivedMetadataHandling(const QString &savePath, const QSt
         p.renamed_files[lt::file_index_t {i}] = fileNames[i].toStdString();
     p.save_path = Utils::Fs::toNativePath(savePath).toStdString();
 
+    // Use qBittorrent default priority rather than libtorrent's (4)
+    p.file_priorities = std::vector(fileNames.size(), static_cast<lt::download_priority_t>(
+            static_cast<lt::download_priority_t::underlying_type>(DownloadPriority::Normal)));
+
     reload();
 
     // If first/last piece priority was specified when adding this torrent,